Description LED PAR IS31LT3932 is a universal LED driver, which can operate in fly-back, buck-boost and buck convertor. For isolation fly-back, it can achieve high PF, high current accuracy, ± 5 % load and line regulation and wide voltage input voltage range, without loop compensation. For buck convertor, it also can achieve high PF, high current accuracy, high efficiency, good load and line regulation and wide voltage input voltage range, without loop compensation. with very few components. IS31LT3932 has special power line sense and output voltage sense circuits, operates in primary feedback mode without opto-coupler and achieve stable output current control without any loop compensation. Quick Start Recommended Equipment 85~265VAC/50~60Hz power supply Absolute Maximum Ratings 265VAC power supply 39V Vout (Total Vf) Caution: Do not exceed the conditions listed above, otherwise the board will be damaged or the output will be limited IS31LT3932 has multiple protections to improve the system reliability, including LED open circuit, LED short circuit, UVLO, OVP, current sense resistor short, the primary over current limit and over temperature protections. Features Universal isolation and non-isolation Single stage PFC fly-back No loop compensation required No opto-coupler required ± 3 %LED current accuracy ± 5 % line regulation and load regulation Wide input voltage: 85~265Vac Low start-up current(15ua) Valley turn-on MOSFET to achieve high efficiency for buck application Few external components 1A sourcing current and 2A sinking current multiple protections Applications Procedure The IS31LT3932 DEMO Board is fully assembled and tested. Follow the steps listed below to verify board operation. Caution: Do not turn on the power supply until all connections are completed. 1) Connect the input pin N of the Evaluation Board via the main power switch to AC power supply N. 2) Connect the input pin L of the Evaluation L. 3) Turn on the power supply. Ordering Information PART# TEMP IC RANGE PACKAGE IS31LT3932-GRLS2-TR -40 to 125 C SOP-8 LED bulb LED Tube lamp For pricing, delivery, and ordering information, please contact ISSI at analog_mkt@issi.com or call +1-408-969-6600 1 1
Figure 1 IS31LT3932 Evaluation Board Schematic Note: ISSI Evaluation Board does include a LED array Figure 2 Picture of Evaluation Board NOTE: Physical dimensions of power board are (L W H): 53mm 20mm 15mm 2 2
PCB Layout Figure 3 PCB Layout Top layer Figure 4 PCB Layout Bottom layer 3 3
Bill of Materials No. Name Description Ref Des. Qty. 1 FUSE 1A250V Φ3 F1 1 Mfr P/N 2 Bridge rectifier MB6S MBS BD1 1 3 Inductor 3.3mH 0510 L1,L2,L3 3 4 Resistor 5.5kΩ 1% 0805 R2,R4,R13 3 5 Resistor 1M Ω 1% 1206 R5,R9 2 6 Resistor 13kΩ 1% 0805 R18 1 7 Resistor 300kΩ 1% 1206 R6,R10 3 8 Resistor 240kΩ 1% 0805 R17 1 9 Resistor 1.0Ω 1% 1206 R20 1 10 Resistor 200Ω 1% 0805 R7 1 11 Resistor 10kΩ 1% 0805 R23 1 12 Resistor 240kΩ 1% 0805 R22 1 13 Resistor 68k Ω 1% 1206 R8 1 14 Resistor 0Ω 1% 0603 R12 1 15 Resistor 150kΩ 1% 0603 R3 1 16 Resistor NC R21,R1,C1,C5,C11,C8, R14,D3 0 17 CBB-CAP 100nF 400V pin10 C1 1 18 SMD-CAP 1nF 1000V 1206 C2 1 19 E-CAP 220uF 50V 0810 C3,C4 2 20 SMD-CAP 1nF 25V X7R 0805 C7 1 21 SMD-CAP 1uF 50V X7R 1206 C10 1 22 SMD-CAP 10uF 50V X7R 0805 C9 1 23 SMD-DIODE ES1J SMA D5,D2 2 24 SMD-DIODE 1N4007 SOD-123 D6 1 25 SMD-DIODE 1N4148 SOD-80 D4 1 26 SMD-ZENER 39V 1% SOD-80 D7 1 27 MOS 2N80B TO-251 Q1 1 28 IC IS31LT3932 SOP-8 U1 1 29 TRANSFORMER EE16 5+5 TR 1 30 TH- DIODE SB5200 DO-201AD D1 1 4 4
Transformer Design ELECTRICAL SPECIFCATIONS: 1.Primary inductance(lp)=1.1mh@10khz 2. Primary Leakage Inductance (Lk)< = 30uH @10KHz 3. Electrical Strength = 3KV, 50/60Hz,1Min MATERIALS: 1. Core:EE16(Ferrite Material TDK PC40 or equivalent) 2. Bobin:EE16 Primary 5,Secondary:5 3.. Magnet Wires (Pri) : Type 2-UEW 4. Magnet Wire (Sec) : Triple Insulated Wires 5. Layer Insulation Tape :3M1298 or equivalent. SCHEMTIC No winding start end Wires Tape 1 N1 3 10 85T 0.18mm-QA 9mm-3 2 N2 10 1 44T 0.35mm-QA 9mm-2 3 N3 4 5 40T 0.18mm-QA 9mm-2 5 5
Test Data 5LED Vin PF THD PIN VOUT IOUT eff.. 85 0.998 2.0% 3.35 14.96 177 79.04% 90 0.998 1.9% 3.35 14.96 178 79.49% 100 0.997 2.3% 3.35 14.96 180 80.38% 110 0.996 2.6% 3.39 14.98 183 80.87% 120 0.994 3.2% 3.41 14.99 185 81.32% 130 0.991 4.0% 3.42 14.99 186 81.52% 140 0.988 5.0% 3.46 15.02 188 81.61% 150 0.984 6.0% 3.43 15.00 188 82.22% 160 0.978 8.0% 3.27 14.93 178 81.27% 170 0.972 9.4% 3.31 14.95 181 81.75% 180 0.967 10.9% 3.31 14.95 181 81.75% 190 0.961 11.7% 3.38 14.99 184 81.60% 200 0.953 13.4% 3.39 14.99 183 80.92% 210 0.946 14.8% 3.47 15.01 187 80.89% 220 0.938 17.3% 3.45 15.02 186 80.98% 230 0.931 18.9% 3.53 15.06 189 80.63% 240 0.923 20.6% 3.58 15.05 191 80.29% 250 0.913 21.9% 3.61 15.06 192 80.10% 260 0.906 24.7% 3.66 15.08 195 80.34% 265 0.901 24.4% 3.71 15.10 196 79.77% 6 6
6LED Vin PF THD PIN VOUT IOUT eff.. 85 0.999 1.7% 4.00 17.94 177 79.38% 90 0.998 1.6% 4.01 17.98 178 79.81% 100 0.998 2.0% 3.99 17.95 180 80.98% 110 0.997 2.2% 4.01 17.95 182 81.47% 120 0.996 2.6% 4.02 17.95 184 82.16% 130 0.994 3.1% 4.10 18.07 187 82.42% 140 0.992 3.9% 4.11 18.06 188 82.61% 150 0.989 4.4% 4.16 18.08 190 82.58% 160 0.984 5.7% 3.93 17.98 180 82.35% 170 0.981 7.2% 3.92 17.98 180 82.56% 180 0.976 8.6% 3.97 17.99 182 82.47% 190 0.970 9.5% 4.00 17.98 184 82.71% 200 0.967 10.9% 4.05 18.02 185 82.31% 210 0.960 11.7% 4.11 18.07 187 82.22% 220 0.954 13.4% 4.15 18.07 190 82.73% 230 0.947 15.1% 4.17 18.05 189 81.81% 240 0.941 17.3% 4.22 18.08 191 81.83% 250 0.935 18.8% 4.31 18.11 194 81.52% 260 0.926 19.8% 4.33 18.10 193 80.68% 265 0.922 20.1% 4.34 18.08 196 81.65% 7 7
7LED Vin PF THD PIN VOUT IOUT eff.. 85 0.999 1.8% 4.68 20.93 177 79.16% 90 0.999 1.7% 4.64 21.03 177 80.22% 100 0.998 1.6% 4.62 20.91 179 81.01% 110 0.998 1.9% 4.69 21.10 182 81.88% 120 0.997 2.2% 4.67 20.92 183 81.98% 130 0.996 2.5% 4.75 21.16 185 82.41% 140 0.994 3.2% 4.76 21.15 186 82.64% 150 0.992 3.6% 4.81 21.16 189 83.14% 160 0.988 4.9% 4.55 21.05 181 83.74% 170 0.985 5.6% 4.58 21.06 181 83.23% 180 0.982 6.5% 4.63 21.06 183 83.24% 190 0.978 7.4% 4.63 21.06 183 83.24% 200 0.974 8.4% 4.68 21.06 184 82.80% 210 0.969 10.4% 4.71 21.06 185 82.72% 220 0.963 10.9% 4.79 21.09 188 82.77% 230 0.959 12.3% 4.82 21.20 189 83.13% 240 0.953 13.3% 4.89 21.19 190 82.33% 250 0.946 15.2% 4.89 21.13 193 83.40% 260 0.940 16.1% 4.98 21.13 194 82.31% 265 0.937 17.3% 5.00 21.13 195 82.41% 8 8
8LED Vin PF THD PIN VOUT IOUT eff.. 85 1.000 1.8% 5.41 23.90 178 78.64% 90 1.000 1.7% 5.33 23.90 177 79.37% 100 0.999 1.7% 5.27 23.87 179 81.08% 110 0.998 1.7% 5.28 23.94 180 81.61% 120 0.998 1.9% 5.32 23.90 183 82.21% 130 0.997 2.2% 5.41 24.07 186 82.75% 140 0.995 2.5% 5.40 24.03 187 83.22% 150 0.994 3.1% 5.43 24.05 188 83.27% 160 0.991 3.8% 5.14 23.93 179 83.34% 170 0.988 4.8% 5.16 23.95 180 83.55% 180 0.986 5.4% 5.22 23.97 182 83.57% 190 0.982 6.4% 5.23 23.97 183 83.87% 200 0.979 7.4% 5.33 24.00 185 83.30% 210 0.975 8.4% 5.35 24.00 186 83.44% 220 0.972 9.6% 5.40 24.01 187 83.15% 230 0.966 10.2% 5.40 24.02 187 83.18% 240 0.960 11.8% 5.40 24.04 188 83.69% 250 0.956 12.7% 5.60 24.08 192 82.56% 260 0.951 14.3% 5.62 24.07 193 82.66% 265 0.949 14.5% 5.66 24.08 194 82.54% 9 9
9LED Vin PF THD PIN VOUT IOUT eff.. 85 1.000 1.7% 6.12 26.96 178 78.41% 90 1.000 1.8% 6.05 26.91 178 79.17% 100 0.999 1.7% 6.02 26.95 180 80.58% 110 0.999 1.6% 5.94 26.94 180 81.64% 120 0.998 1.7% 5.94 26.88 182 82.36% 130 0.997 1.8% 5.98 26.95 184 82.92% 140 0.996 2.3% 6.09 26.99 187 82.88% 150 0.995 2.6% 6.11 27.00 189 83.52% 160 0.993 3.4% 5.78 26.86 180 83.65% 170 0.991 3.8% 5.80 26.86 181 83.82% 180 0.988 4.7% 5.80 26.85 181 83.79% 190 0.986 5.6% 5.90 26.87 185 84.25% 200 0.983 6.2% 5.99 26.90 186 83.53% 210 0.980 7.1% 6.03 26.89 187 83.39% 220 0.977 8.0% 6.10 26.90 189 83.35% 230 0.973 9.0% 6.13 26.91 190 83.41% 240 0.969 9.9% 6.18 26.91 191 83.17% 250 0.964 11.0% 6.19 26.89 191 82.97% 260 0.960 12.0% 6.29 26.89 193 82.51% 265 0.958 12.6% 6.32 26.93 195 83.09% 10 10
10LED Vin PF THD PIN VOUT IOUT eff.. 85 1.000 1.4% 6.90 30.23 179 78.42% 90 1.000 1.7% 6.80 30.01 179 79.00% 100 1.000 1.7% 6.64 29.80 180 80.78% 110 0.999 1.6% 6.62 29.80 180 81.03% 120 0.998 1.6% 6.58 29.79 181 81.95% 130 0.998 1.7% 6.58 29.62 183 82.38% 140 0.997 2.0% 6.67 29.87 186 83.30% 150 0.996 2.3% 6.74 29.89 188 83.37% 160 0.994 3.0% 6.33 29.70 179 83.99% 170 0.992 3.5% 6.43 29.74 181 83.72% 180 0.991 4.0% 6.46 29.74 182 83.79% 190 0.989 4.7% 6.55 29.78 185 84.11% 200 0.986 5.5% 6.56 29.78 185 83.98% 210 0.983 6.3% 6.61 29.79 187 84.28% 220 0.980 6.9% 6.70 29.82 189 84.12% 230 0.977 8.1% 6.73 29.82 190 84.19% 240 0.974 9.1% 6.81 29.84 191 83.69% 250 0.970 10.0% 6.83 29.84 192 83.88% 260 0.965 10.4% 6.85 29.84 191 83.20% 265 0.965 11.3% 7.00 29.92 195 83.35% 11 11
Line Regulation PF 12 12
THD Efficiency 13 13
Load Regulation 14 14
EMI test Report Figure 5. L line 15 15
Figure 6. N line Copyright 2011 Integrated Silicon Solution, Inc. All rights reserved. ISSI reserves the right to make changes to this specification and its products at any time without notice. ISSI assumes no liability arising out of the application or use of any information, products or services described herein. Customers are advised to obtain the latest version of this device specification before relying on any published information and before placing orders for products. Integrated Silicon Solution, Inc. does not recommend the use of any of its products in life support applications where the failure or malfunction of the product can reasonably be expected to cause failure of the life support system or to significantly affect its safety or effectiveness. Products are not authorized for use in such applications unless Integrated Silicon Solution, Inc. receives written assurance to its satisfaction, that: a.) the risk of injury or damage has been minimized; b.) the user assume all such risks; and c.) potential liability of Integrated Silicon Solution, Inc is adequately protected under the circumstances. 16 16